Bi-Weekly
http://www.thefreedictionary.com/biweekly Happening every two weeks. Happening twice a week; semiweekly. http://www.merriam-webster.com/dictionary/biweekly occurring twice a week occurring every two weeks fortnightly http://en.wiktionary.org/wiki/biweekly Occurring once every two weeks. Occurring twice a week Here is the bottom line: The prefix bi- applies to the week rather than to the events that occur, therefore giving the sense of “every two…